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Dairy Cattle And Reproduction

Subjects : industries, dairy
Instructions:
  • Answer 50 questions in 15 minutes.
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  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. (male) definition: duct located outside of the testes. 3 parts: head - body - tail. 4 Functions:concentrate sperm - store sperm - transport sperm - site of sperm maturation. entire process takes ~40-60 days






2. Not under a timeline - cow can not be sold as steak






3. Gonadotropic (GnRH) is (FSH and LH). Follical Stimulating (FSH) and Lutinizing Hormone (LH).






4. Cleans and lubricates the urethra. secretion is thick - viscous - and very slippery.

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5. Animals which have many estrous periods during certain periods per year (ex: mare - ewe)






6. Failure to have one testis (gonad) to descend






7. To remove/separate testicles from animal's body before animal reaches puberty






8. Examine accessory glands - also to know how big the pelvic opening is->heritable->relates to how much dystocia that bull's daughter has






9. 45-60 days after breeding; re-breed as required






10. (from Jersey Islands in Great Britain) Smallest cow - least milk - highest butterfat %






11. Completes uterine growth initiated by estrogen and prepares the uterus for nourishment of developing embryo if pregnancy occurs - supports pregnancy by maintaining quiescent state of reproductive tract and suppresses mating behavior - prevents ovulat






12. 2 month growth cycle. stored in the epididymis of the bull






13. Animal which has been castrated after puberty






14. Birthing process (termination of gestation)






15. Important 'landmark' during palpation






16. Milk ~305 days - dry 60 days prior to calving






17. (LH) causes female's egg to break (her period)






18. Sperm production






19. ~305 days (altough often longer due to breeding difficulties)






20. Why Dairy calves are fed powdered milk.






21. Animals which have many estrous periods per year (ex: cow - sow)






22. Cleans and lubricates the urethra. secretion is thick - viscous - and very slippery.

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23. Animals which have only one estrous cycle (ex: dog - fox)






24. Duct through penis that carries sperm and urine






25. Why does estrus happen before ovulation?






26. Head - neck - mid-piece - tail. genetic material - has an enzyme covering that allows it to penetrate the egg






27. 1. need to be restricted in amt of grain - 2. no more than 70% of ration can be concentrates. 3. *Acidic acid has to be produced in order for milk synthesis to occur (30% forages)






28. Larger the cow - more milk is produced; smaller the cow - less milk is produced






29. Animals which have only one estrous cycle (ex: dog - fox)






30. 19-23 (21) days






31. What about the sperm for a bull which has been castrated but still has testicles?






32. Check feet and legs - look for masculine traits in build such as crest and muscling






33. Male on one pin and female on other side






34. Not under a timeline - cow can not be sold as steak






35. Boars and stallions-> deliver semen directly into the cervix. bulls and rams-> deliver semen into the vagina.






36. 1. seminiferous tubules - 2. sertoli cells - 3. leydid or interstitial cells






37. Front feet and head first. (except for hogs and dogs)






38. Pulls sperm and egg together - gets body ready for pregnany - stimulates growth cells - develops mammary glands - starts to deposit fat.






39. BST given to dairy cattle makes the mammary gland more persistent - helps produce more milk. good as Long-term because it does not cause cow to bulk up - provides more milk/cow Which means less cows needed - less cows need to be given feed - lower co






40. Pulls sperm and egg together - gets body ready for pregnany - stimulates growth cells - develops mammary glands - starts to deposit fat.






41. When are steers and heifers weaned from bottle feeding?






42. Failure to have one testis (gonad) to descend






43. Sperm is produced here






44. Small tubes located at the upper ends of the uterine horns. connects uterine horn to infundibulum. passageway of the egg.






45. Look for infection - split - and rupture of the penis






46. The more stressed out the male is - the less sperm he is going to produce






47. Provide nourishment for the developing sperm






48. Why Dairy calves are fed powdered milk.






49. When are dairy cattle dehorned?






50. Animals which have many estrous periods per year (ex: cow - sow)